A supermarket has 30 checkout lanes, all of which have been traditionally staffed during peak time on Saturday morning. However, recent cost-cutting efforts have led to a reduction to only 29 cashiers on duty during peak time. The result was that average customer waiting time increased from 4 to 4.5 minutes. The store manager, seeking further cost reductions, has proposed reducing staffing to 28 cashiers. He argues that this will only increase wait times from 4.5 to 5 minutes, which will not irritate customers too much. Do you agree with his reasoning